(1996). Tunnelling '97: Papers presented at the 'Tunnelling '97' conference, held in London, United Kingdom from 2 to 4 September, 1997. London: Institution of Mining and Metallurgy.
Παραπομπή Chicago StyleTunnelling '97: Papers Presented At the 'Tunnelling '97' Conference, Held in London, United Kingdom From 2 to 4 September, 1997. London: Institution of Mining and Metallurgy, 1996.
Παραπομπή MLATunnelling '97: Papers Presented At the 'Tunnelling '97' Conference, Held in London, United Kingdom From 2 to 4 September, 1997. London: Institution of Mining and Metallurgy, 1996.
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